<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <ul v-for="(msg,index) in msgList" :key="index">
            <li>
                {{msg}}
                <button @click="del(index)">删除</button>
            </li>
        </ul>
        <button @click="add">生成</button>
    </div>
    <script src="../vue.js"></script>
    <script>
        const app = new Vue({
            el: '#app',
            data:{
                msgList:[]
            },
            methods:{
                add(){
                    const Randomer = Math.floor(Math.random()*20)+1
                    this.msgList.push(Randomer)
                },
                del(index){
                    this.msgList.splice(index,1)
                }
            }
        })
    </script>
</body>
</html>